GASKET 5I7534 - Caterpillar

System Operation Description:Use this procedure under the following situation:Use this procedure if any of the following diagnostic codes are present:
1-11 Cylinder #1 Injector current fault (72)
2-11 Cylinder #2 Injector current fault (72)
3-11 Cylinder #3 Injector current fault (73)
4-11 Cylinder #4 Injector current fault (73)
5-11 Cylinder #5 Injector current fault (74)
6-11 Cylinder #6 Injector current fault (74)Also use this procedure if you have been directed to this test from Troubleshooting, "Engine Misfires, Runs Rough or Is Unstable " or Troubleshooting, "Low Power/Poor or No Response to Throttle".Perform this procedure under conditions that are identical to the conditions that exist when the problem occurs. Typically, problems with the injector solenoid occur when the engine is warmed up and/or when the engine is under vibration (heavy loads).The following background information is related to this procedure:The engines use Hydraulic Electronic Unit Injectors that are hydraulically actuated and electronically energized. The solenoid is mounted on top of the fuel injector body.The injectors can be individually cut out to aid in troubleshooting misfire problems. Use the Cylinder Cutout Test to disable individual injectors.The injector solenoids can also be actuated without running the engine in order to check the operation of the solenoids. Use the Injector Solenoid Test to perform this function.Note: The Injector Solenoid Test will not help find leaks in the high pressure oil system.
Illustration 1 g00925335
Left side view of the engine
Illustration 2 g00925337
Top view of the engine
Illustration 3 g00942365
Circuit schematic for the injectorsTest Step 1. Inspect Electrical Connectors and Wiring
Illustration 4 g00925669
Pin locations for ECM connector P2
Electrical shock hazard. The electronic unit injector system uses 90-120 volts.
Turn the key switch to the OFF position. A strong electrical shock hazard is present if the key switch is not turned OFF.
Thoroughly inspect the ECM engine harness connector J2/P2 and the solenoid connector for the injector J300/P300. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector and the solenoid connector for the injector J300/P300 that are associated with injector solenoids.Refer to Illustration 4.
Check the ECM connector (allen head screw) for the proper torque of 6.0 N m (55 lb in).
Check the solenoid connector for the injector J300/P300 in order to ensure the proper mating of the connector.
Check the harness and wiring for abrasion and pinch points from the injectors to the ECM.Expected Result:All connectors, pins and sockets should be completely coupled and/or inserted and the harness and wiring should be free of corrosion, abrasion or pinch points.Results:
OK - Proceed to Test Step 2.
Not OK - Repair: Perform the following repair:Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled.Verify that the repair eliminates the problem. Stop.Test Step 2. Use the Caterpillar Electronic Technician (Cat ET) to Check for Logged Diagnostic Codes
Connect Cat ET to the data link connector.
Turn the key switch to the ON position.
Monitor the "Logged Diagnostic Code" screen of Cat ET.Expected Result:One